A football player running at two meters per second dives towards a football flying towards him with a velocity of five meters per second. what is the relative velocity of the football player and the football?

a. 0 m/s

b. 2 m/s

c. 5 m/s

d. 7 m/s

What can cause a gap in the rock record

If bert the bat traveles eastward at 40 mph with a tail wind of 6 mph, what is his actual speed?

Scientists discovered that stars in the universe are mostly composed of which elements? a. hydrogen and helium b. hydrogen and oxygen c. oxygen and nitrogen d. helium and nitrogen

What determines how the plates interact at their boundaries

You are given a marble by your instructor and are asked to measure its density. Unfortunately, marbles roll when placed on a balance pan, so you decide to use a beaker to hold the marble while you measure its mass. An empty beaker has a mass of 31.

After creating a question and forming a hypothesis, what is the next step in the scientific method

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.51 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?